Copper complex compounds of polyazo dyestuffs



' 3,033,846 Patented May 8, 1962' {Flee 3,033,846 COPPER COMPLEX (ZGMPOUNDS F POLYAZG DYESTUFFS Albert Demagistri, Binningen, near Basel, Hans Ischer,

Basel, and Walter Wehrli, Riehen, near Basel, Switzerland, assignors to Sandoz Ltd, Basel, Switzerland No Drawing. Filed Dec. 5, 1958, Ser. No. 778,313 Claims priority, application Switzerland Mar. 13, 1956 6 Claims. (Cl. 260-145) The present application is a continuation-in-part of the application Ser. No. 643,237, filed March 1, 1957, now abandoned, and relates to copper containing polyazo dyestufis of the formula OH OH wherein n has the previously defined meaning, and with 1 mol of the same azo component or with 1 mol of a hydroxybenzene, a hydroxynaphthalene or a l-aryl-S- pyrazolone coupling in ortho-position to a phenolic or enolic hydroxy group and treating subsequently the polyazo dyestufi so formed which must contain at least three sulfonic acid groups, in substance with a copper-yielding agent.

The monoazo dyestuffs of general Formula H employed in the coupling reaction are applied preferably in the form of their copper complex compounds. They may be coupled either in the first or second instance with the tetrazotized 4.4'-diamino-3.3'-dimethoxy-1.l'-diphenyl. The coupling components corresponding to the radical R-OH are preferably a monoazo dyestuif H-ZOH, if desired in the decopperized or uncoppered form of the Formula H, a hydroxybenzene, a hydroxynaphthalenemono-, -dior -trisulfonic acid, a dihydroxynaphthalenemonoor disulfonic acid, an acylaminohydroxynaphthalenesulfonic acid or a l-aryl-S-pyrazolone which may be sulfonated in the aromatic nucleus. The coupling reactions are conducted in an alkaline, preferably soda alkaline, medium; the second coupling reaction may be carried out with the addition of pyridine or a mixture of pyridine bases.

The coppering of the new polyazo dyestufis in substance is carried out in such a way as to cause splitting of any alkoxy groups which may be present. Examples of suitable copper-yielding agents are copper sulfate, copper acetate and copper formate.

The dyestuffs can be coppered, for example, by heating with copper salts in a weakly acid to alkaline medium, if desired with pressure and/or in the presence of ammonia or organic bases, or in the suspension of an alkali metal salt of a low molecular aliphatic monocarboxylic acid.

The copper-containing polyazo dyestutfs dye cotton and fibers of regenerated cellulose in very level blue-gray t0 green-gray shades. The building-up properties on these fibers can easily be regulated by gradual addition of salts such as sodium sulfate, chloride or carbonate, or by mixture of such salts.- In other words, the dyestuffs possess excellent salt-controllability, by virtue of which level, well penetrated dyeings are obtained, e.g. on crosswound yarn packages, and shading vn'th other dyestuffs is facilitated. The new dyestuifs also give penetrated dyeings on dead cotton.

The fastness properties obtained with the new dyestuffs are excellent. The dyeings on natural and regenerated cellulose fibers show very good fastness to light and to wet treatments such as washing, water, perspiration, sea water, wet pressing, Water spotting, etc. In addition they are readily dischargeable and fast to scrooping, formaldehyde, alkalis and acids. The new dyestuffs give a very good reserve of cellulose acetate, wool, silk, nylon, Perlon, acrylic and polyester fibers. They show no appreciable change of shade on aftertreatment with resin crease-resisting agents and the dyeings reteain excellent light and wet fastness properties after such finishing; The fastness to gas fume fading is also very good. The dyestuffs are insensitive to lime and only very slighfly sensitive to the metals iron, copper and chromium. The fastness properties can be further improved by aftertreating the dyeings with a polyalkylene polyamine in presence of a copper salt or with a, polyalkylene-polyamine containing copper in complex combination.

The following examples illustrate the invention. The parts and percentages specified therein are by weight and the temperatures are in degrees centigrade.

Example 1 24.4 parts of 4.4'-diamino-3.3'-dimethoxy-l.1'-diphenyl are suspended in parts of water, 54 parts of concentrated hydrochloric acid and 150 parts of ice. To the suspension at 0-2 is added a solution of 13.8 parts of sodium nitrite in 50 parts of water. A solution of 34.8 parts of sodium 1-hydroxynaphthalene-3.6-disulfonate and 50 parts of water is poured into the so-formed tetrazo solution at 0-5 to give the intermediate diazomonoazo compound. Upon the addition of a solution of 6 parts of soda in 30 parts of water the one-sided coupling reaction to give the diazomonoazo compound takes place easily and quantitatively. The final coupling reaction is efiected by adding to the solution of the intermediate compound at 510 a solution of 58.6 parts of the monoazo compound of general formula on i no on lution' and filtered E. -It corresponds to the'formula in 700 parts of pyridine 700 parts of water. The

resultant mixture at -12? is given 100 parts 050011- On completion of coupling the ce'ntrated ammonia. trisazo dyestuff thus formed is salted out from the sosoar! JEN ' suspension, which is then heated to 80. At SO-90 the suspension is fed in the courseof 30 minuteswith a soluof 75 parts of crystallized copper sulfate and 105 parts of I concentrated ammonia in 450 parts of water, and the" trisazo dyestuit thus brought into solution. Mechanical stirring of the solution at -9597 is maintained for a further 20 hours. After this time the copper-containing trisazo dyestufi so formed is salted out from the solution, filtered oil and dried. It is a dark powder which dissolves in water with a. blue coloration and' in concentrated sulfuric acid with a blue-green coloration; it dyes cotton and fibers of regenerated cellulose in blue-gray shades fast to light, washing, perspiration.

0.1 part of the copper-containing trisazo dyestufi is dissolved in' 300 parts of lime-free water. 10 parts of wetted cotton fabric are introduced into this liquor at 30", which a is then heated to 100 over a period of 30 minutes. Dyeing is continued at this ten'iperattue for minutes. In (because of the dyeing process a 10% aqueous solution of 3-4 parts of sodium sulfate is added to the dyeliquor in portions; After the prescribed dyeing time the cloth is left in the liquor for 15 to minutes till the temperature has fallen to 50, thenfremov'ed, rinsed'with water, centrifuged and dried. Upon after treatment with a basic, cationf'active copper complex compoundthe wet fastness properties of the dyed cotton "show a marked improvement. 1

Example 2 31.7 parts of 4.4'rdiamino-3.3'-dimethoxy-l.1'-diphenyl dihydrochloride are stirred into a mixture of 250 parts of water, 35.5 parts of concentrated hydrochloric acid and 150 parts of ice. A solution of 13.8 parts of sodium nitrite and 50 parts of water is added to the suspension at 2 and the mixture stirred until tetrazotizing is completed. To produce the intermediate compound thetetrazo solution at 5 is given a solution of 64.7 parts, of the copper complexcompound of the monoazo' dyestuli of general formula HO S SOxH

in 350 parts of water, 15 parts of caustic soda 30% and 50 parts of a 20% soda solution. Following this, a further 75 parts of a 20% soda solution are added to the coupling mixture. The one-sided coupling reaction ensues easily and quantitatively. l

The final coupling reaction is carried out by adding to the solution of the intermediate product a solution of 33.4 part; of 1phenyl-3-methyl-5-pyrazolone-2'.4 disultonic acid in 150 parts of water and 100 parts of a 20% soda solution. When the coupling reaction is completed the '75 so-formed tn'sazo-dyestufl is salted out and filtered off.

osages The demethylating and v coppering of the trisazo dyestuff is conducted in a manner similar to that described in the first example. The copper-containing trisazo dyestulf is a dark powder which dissolves'in water with a blue- 5 gray coloration, and dyes cotton and fibers of regenerated V on I H0 5 N=N N==N H035 stufi on cotton is indicated.

Example Ls'Dihydroxynaph- Second Azo Compo- Shade of the N0. thalenesullonic acid ncnt 7 Copper- Containing Dyestufi on Cotton 3. 1.8-Dihydroirynaph- 1-Hydroxynaphthaleneblue-gray. thalene-atrdisul- 3.8-disullo1uc acid.

tonic acid. V 4 LS-Dihydrogrynaph Z-Hydroxynaphthalenc- Do.

' tha iene-bf-sulfonic- ,3 .6-d1sultouicac1d.

5 1;8 -Dihydroxynaph- 2-Hydroxynaphthalene- Do.

' 'thalene3.6disul- 4-sulfonic acid.

ionic acid. 6 Ls-Dihydroxynaphl-Hydroxynaphthalenc- Do.

thaeue-tsulionic 3,6,8-trisuliomc acid. aci r 7 1.8-Dihydroxynaph-' 2-Benzoylamino-5- gray-blue.

thalene3.6-disulhydroxynaphtha lene-T-sultonic acid 8 LS-Dihydrcxynaplr l-Phenyl-3-methyl5-' gray.

thalene-3-sulionic pyraz0lone-3-sulacid. tonic ac 9 LB-Dihydroxynaph- 1-Naphthyl(2)-3-me- Do.

thaleue-Mrdisulthyl-dpyrazoloneionic acid. 6-sulfonic acid.

10 do l-Phenyl-B-methyl-S- DO.

pyrazolone-Z'sulionic acid.

1 LS-Dihydroxynaphl-Phenyl-3-methyl-5- D0.

. thalene--sulionic pyrazolone-4-sulacid. tonic acid.

12 l.8 Dihydroxynaphl-Phenyl-B-methylh- D0.

thalenc-Iiddisulpyrazolone-3-carb0xtonic acid. ylic acid.

13. o 1-Phenyl-5-pyrazo- D0.

lone-Zi-carboxylic 14-; do 1.5-Dihydroxy-2-(l' gray-blue.

' 8'ai y m yl-n p thyl(2)-azonaphthalene-7.3.6-trisulionic acid.

15, do 1.5-Dihydroxy-2-(l' 8'-dihydroxy)-naphthyl(2')-azonaphthaleuc-7.3-disulionic acid. 16--..-- do 1.5 Dihydroxy-2-(1, 0.

' i j 8-dihydroxy)-naphthyl(2)-azonaphtha,- lene-7.4'-disulfonie acid. 7 l7 Ls-Dlhydroxynaphythalene-4'sulionic acid. 18 LS-Dihydroxynaphdo thalene-B-sullonic 7 acid. 19 LS-Dihydroxynaphl-Hydroxy-l-methyl, Do.

' thalene'dfialisulbenzene.

ionic-acid. 20 do l-Hydroxy-z-acetyl- Do- 7 amino-4-methylbonzene. 21 do 1-Hydroxy-2sulfo- DQ- acetylamino-4- inethylbenzene.

Formulae of representative dyestufis of the foregoing examples are as follows.

SOQH

t group consisting of (a) the radical of 1-hyd1-oxy-4- Example 14: I i x r HO O- C u:O coupling component selected from the group consisting L 803E of the monohydroxynaphthalene series containing up to 5 three sulfonic acid groups, and a benzolyaminomonohy- Q SO33 N: droxynaphthalene monosulfonic acid, said radical being {i coupled in ortho-position to --O-- and (c) the radical of a coupling component selected from the group con i S0311 1'0 sisting of the l-phenyl-d-pyrazolone series and the V 'naphthyl-S-pyrazolone series, coupledin ortho-position to H 5033 O---; and ri is a positive whole number of at most 2, O 15 there being at least three sulfonic acid groups in the dye Having thus disclosed the invention, what we claim is: stuff molecule.

1. A copper-containing trisazo dyestufit of the formula 2. The copper'complex dyestuff which corresponds to the formula 3. The copper-complex dyestufl which corresponds to 4. The copper-complex dyestufi. which corresponds to methylbenzene and Z-acetylamino derivatives thereof 7 the formula Hogs,

coupled in ortho-position'to 0, (b) the radical of a 1 The copper-complex dyestufi which cormsponds to tne formula 9 j 10 6. The copper-complex dyestuff which corresponds to the formula H0 0 cn-0 o Referehces Cited in the file of this patent UNITED STATES PATENTS 2,644,813 Ruckstuhl et al. July 7, 1953 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,033,846 May 8, 1962 Albert Demagistri et a1.

It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, line 31, for "-1. read -l.l' --5 columns 5 and 6, lower right-hand portion of the formulae in Examples 1 and 4, for SO 0", each occurrence, read 'SO3H column 8, lines 5 and 6, for "benzolyaminomonohydroxynaphthalene" read benzoylaminomonohydroxynaphthalene Signed and sealed this 20th day of November 1962.

(SEAL) Attest:

ERNEST w. SWIDER DAVID LADD testing Officer Commissioner of Patents 

1. A COPPER-CONTAINING TRISAZO DYESTUFF OF THE FORMULA 